I'm not encouraging you to break rules, but, is this considered betting? You're not putting up any money, you're simply entering a contest with prizes. It'd be like winning a pin-the-tail-on-the-donkey contest at a 4th grader's birthday party, and getting a king size candy bar as a prize. Except football and Amazon money.

EDIT: Read up on NCAA rules, looks like you really can't enter. Sorry=(